VT50 yellow-ish blob on display - Page 35 - AVS Forum | Home Theater Discussions And Reviews

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post #1021 of 1024 Old 04-02-2015, 05:01 PM
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Yeah, I know. Always wondered if it would happen. Like I said though, I honestly don't care that much with how much it really impacts things when I'm watching my films, since I don't really notice it then unless I really strain to see it. Definitely one of those issues you'd have a fun time trying to explain to someone in person even viva AVS
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post #1022 of 1024 Old 01-23-2016, 09:48 PM
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I know this is an older thread but i just wanted to update my own findings after a few years since my last reply.

I was one of the original people to go with fans on the back along with the VSUS pot tweak on the back of the TV along with the service menu vsus low to high setting.

I now have 10000 hours and I have noticed that internal programmed voltage increases that are programmed to automatically increase little by little as more hours put into the TV set has removed all discoloring. In another words, now that i've reached 10,000 hours all pink and yellow tinting is now gone from all white screens with no fans needed now.

One thing i noticed over the last year or so...when i initially did VSUS pot tweak, tweaking too much created "sparkles" as others pointed out in here...well I use my UT50 as a PC monitor to do a lot of editing of videos, gaming and watching movies, surfing the net,etc ...recently about 6 months ago i noticed all of a sudden my tv started to get the "sparkles" at the top edge of the screen on its own...it immediately reminded me of when i did the pot tweak on the back of the tv two years ago when i initially tweaked it a bit too far. So when i saw these sparkle artifacts return...I remembered that these TV's are programmed to increase voltages over time to compensate usage slowly by automatically raising voltages in tiny increments. So that just proves why my TV has all pink and yellow blobs gone..This is with back fans off and VSUS back to Low and ECO Energy On.

So those of you still wondering, yes it does get better with age for what it's worth.
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post #1023 of 1024 Old 01-24-2016, 09:27 AM
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I concur. I had the blobs and pretty bad a couple years ago, but over the last year or so I have seen the yellowing diminish to the point that I only rarely notice a very slight discoloration on the right side. For the most part, I do not see it even when I try to pick it up on a bright scene. I too changed over to Eco Energy On shortly after the blobs became apparent and have left it on. Another benefit of Eco Energy is reduced buzzing.
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post #1024 of 1024 Old Today, 06:33 AM
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So I realise this thread is somewhat old but I am having the same issues on my 4 year old UK based Panasonic (TX-P55VT50B).

Fortunately it is covered by a 5 year Panasonic warranty and after having got the local service depot out they have and trying the Panny service bulletin (set VSUS to high and increase the blue drive - no improvement, but no pot tweak) they have reported back to Panasonic who agreed to replace the panel and ordered the part from Panasonic.

The part arrived and they arranged to replace today, however they rung up and now want to take it away to repair as its quite a long job. I am relatively ok with that, however the timing is bad as I am away at the back end of the week so want to be around when they come back and don't want the family to be without a set for a week or more.

So I might ring back and delay the repair till after Christmas as to make sure there aren't any problems.

My TV has been calibrated so am also reluctant to have the panel swapped without trying the pot adjustment.

So after reading the entire thread my questions are:-

1) Anybody have the part number of the 55 panel, just don't want them to take away set for them to have gone oops wrong panel. I am quite surprised they are still available given the length of time they have been out of production. I have found a part number for MD55F15A7J based on a TC-P55VT50 manual but not sure if that is for a US version as I know as when calibrated I used normal as the ISF Day output is too low.

2) Ideally would like it done at home, should I insist or is it worth doing in workshop?

3) How are the pot adjusted ones holding up ? Was there a need to recalibrate?

4) Is it still going to go again? I have measured the temperatures with a spot temp gun and they are higher as people have said in the affected areas.

Any other opinions, ideally want to have a working VT50?

Any help grateful
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